Speed-changing mechanism.



A. E. REUSS & O. SOHNITZLER. SPEED CHANGING MECHANISM.

APPLIOIATION FILED OCT. 16, 1911.

1,058,265. Patented Apr. 8, 1913.

5 SHEETS-SHEET 1.

A. E. REUSS & O. SGHNITZLER.

SPEED CHANGING MECHANISM.

APPLICATION FILED 001'. 16, 1911.

Patented Apr. 8, 1913.

5 SHEETSSHEET 2.

206712 eJaeJ."

Patented Apr. 8, 1913.

5 SHEETS-SHEET 3.

A. E. REUSS & 0. SCHNITZLER. SPEED CHANGING MECHANISM.

' APPLIOATION FILED OCT. 16, 1911. 1,058,265.

Ill IN II I vs..

A. E. REUSS & 0. SCHNITZLER.

SPEED CHANGING MECHANISM.

APPLICATION FILED 0OT.16, 1911.

1,058,265. Patented Apr. 8, 1913.

5 SHEETS-SHEET 4.

- UNITED STATES PATENT OFFICE.

ARTHUR E. REUS'S, or CINCINNATI, AND OSCAR SCHNITZLER, or REMINGTON, 01110.

' SPEED-CHANGING MECHANISM.

' To all whom it may concern:

ther to provide power transmitting elements embracing a movable member and means for moving said movable member embracing power actuating means normally in inactive relation and a connecting member therefor arranged to be moved for forming operative connection in said power actuating'means, and novel initiating means for controlling said connecting member; further to provide transmitting mechanism embracing a mov= 'able member having novel main-clutch connection; further to provide power transmitting mechanism embracing a movable member for effecting speed-change therein and novel means for operating said movable member; further to provide novel initiating means for causing operative relation in said 1 actuating means, and further to provide novel locking means for said initiating means. The invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

Figure l is a plan view of our improved device with the top of the casing removed. Fig. 2 isaside elevation of the same with the side of the casing removed. Fig. 3 is an end elevation of our improved device, looking in the direction of the arrow 3 of Fig. 2. Fig. 4 is a longitudinal section of our improved device taken on the irregular line 44 of Fig. 3. Fig. 5 is a sect-ion on the line 5-5 of Fig. 2 bisecting the axial planes of the operating hub and rollers. Fig. 6 is a cross-section of the operating mechanism taken on the line 66 of Fig. 1. Fig. 7 is a cross-section of the same, taken on the line 77 of Fig. 3; and, Fig. 8 is a side elevation of our improved device showing Specification of Letters Patent. Application filed October 16, 1911.

Patented Apr. 8, 1913. Serial No. 854,869.

its connection: with the maindrive clutch, partly broken away.

11 represents a casing, in which our improved mechanism may be supported and protected from dirt and dust.

12 represents the drive-shaft, which may have suitable connection with the source'of power, which may be, for instance, the crankshaft of a suitable gasolene or other motor. Qur invention is applicable in various relations but is primarily intended for the propulsion of a traveling vehicle, for instance an automobile, and is arranged to be controlled preferably by a suitable controlling mechanism such as shown and described for instance in our copending applications Serial No. 630,094, filed May 29, 1911, and

Serial No. 654,610, filed October 14, 1911,

the latter application being executed of even date herewith.-

The drive-shaft is journaled in a bearing 13 in the casing. 14 is a driven shaft journaled in a bearing 15 in the casing. The

shaft 14 has a journal-end which receives bearing in a gear 16 rigidly secured to the drive-shaft.

20 is a sleeve which rotates with, but is slidable longitudinally of the shaft 14, this shaft being shown polygonal in cross-section, the bore of the sleeve being similarly formed. It has gears 21 and 22 thereon and one of the clutch-facesof a transmitting clutch 23, the other clutch-face whereof is on the gear 16. r

26 is an intermediate shaft journaled in bearings 27 in the. casing, and has rigid therewith a gear 28, which meshes continuously with the gear 16, and gears 29, 30, and 31.

32 is a gear journaled on a stud 33 secured to the casin wand is arranged to be in continuous mesli with the gear 31.

The sleeve 20 is slidable lengthwise of the shaft 14, for placing the clutch-faces of. the transmitting clutch 23 in transmitting engagement, for transmitting, for instance, a high speed directly from the shaft 12 to the shaft 14. or for bringing the gear 21 into mesh with the gear 29, for transmitting an intermediate speed from the-drive-shaft through the gears 16, 28, 29 and 21 to the driven shaft, or for causing meshing relation between the gears 22 and 30 for transmitidl shaft to the driven shaft through the gears 16, 28, 31, 32 and 22.

- The sleeve 20 constitutes a movable member of the power transmitting mechanism. It is of course obvious that other power transmitting mechanism may be employed without departing from the spirit of our invention. The movable member is shifted by novel power driven operating mechanism which we will now describe.

36 is an operating shaft journaled in bearings 37 in the casing and having an operating gear 38 fast thereon.

39 is a shaft -'ournaled in bearings 40 in the casing. The shaft has a gear 41 fast thereon which meshes with the gear 31. The shaft 39 has a worm43 fast thereon'which meshes with a worm-wheel 44 fast on the operating shaft 36. Continuous power rotation is thus imparted to the operating shaft from one of the elements of the power transmitting mechanism, which is exemplified as the intermediate shaft 26, through the medium of the gears 31 and 41. i

47, 48, are swinging frames which comprise the arms 49, 50, forming bell-crank formed frames. These frames are pivoted at 51, 52, to the casing. Each of these frames carries a gear whlch receives motion from the operating gear 38 and an interrupted actuating member, these actuating members rotating in opposite directions and arranged to coact with an intermediate actuating member which has connection with the gear-sleeve 20 for shiftin the same. This connection with the gear-s eeve is shown accomplished by means of a shifting-sleeve 63 which slides longitudinally on a rod 64 received in bearings 65 in the casing and rig clamped thereto, as bynuts 66. The ro is shown polygonal in cross-section, the bore of the shifting-sleeve being correspondingly formed for preventing turning of the shifting-sleeve, but permitting its longitudinal movement.

67 is a fork which extends from the shifting-sleeve and is received in an annular groove 68 in the gear-sleeve for causing simultaneous movement of the shiftingsleeve and gearsleeve.. The shiftingssleeve has a rack 71 thereon which is meshed by a pinion 72 fast on an intermittently rotating actuating member 73, shown as a friction-hub, which isloosely journaled about the operating shaft 36.

74, 75, are friction-rollers which coact with the friction-hub and are respectively fast with gears 76,77, as by ins 53, 54. The friction-roller 74 and gear 6 are journaled about a rod 78 secured in bearings 79 of the oscillating frame 47, and friction-roller and gear 77 are journaled about a rod 80 secured in bea ings 81 of the oscillating frame 48. The gear 76 meshes with an in .termediate gear 82 journaled on a stud 83 secured in a bearing 84 in the casing, the gear 82 meshing with the operating gear 38. The gear '77. meshes with the operating gear 38. By these means tl'lB fIlCi'JIOII-IOHBIS 74, 75, are continuously rotated in opposite directions.

87, 88, are a pair of tongues pivoted respectively at 89, 90, to a rocker-frame 91 having a bearing 92 about the operating shaft 36, held against endwise movement thereon by a collar 86. The said tongues are pivoted on a bracket 93 of said rocker-frame. These tongues are shown as tapering tongues, tapering toward their outer'ends, the tongues being curved and received about the friction-hub 73, against whichsaid respective tongues are arranged tobe tem orarily clamped or pinched by the coacting clamp-faces 96, 97 ,'of the coacting members 74, 75, therefor. These coacting members shown in the form of friction-rollers, being provided with said engaging faces 96, 97,

having interruptions 100, 101, therein.

The friction-rollers 74, 75, are continuously rotated in opposite directions, the engaging faces thereon normally passing the tongues 87, 88, without making operative engagement therewith. If however, either tongue is shifted about the axis of the I rocker-frame 91, by means to be hereinafter explained, one of said engaging faces will impinge said tongue for pinching it between ,said engaging face and the friction-hub 7 3,

momentarily causing said tongue and friction-hub to move or rotate with the frictionroller which impinges said tongue, this movement continuing until the interruption following said engaging face arrives opposite said pinched tongue, whereu on said tongue is snapped back into norma position by the mechanism hereinafter described. In the meantime however, a longitudinal shifting of the shifting sleeve 63 and of the earsleeve 20 will have taken place for shifting said gear-sleeve from a position of power t-ransmision at a (given speed to its next ositions of spec transmision in either mcreasing or decreasing ratio, depend ent on which of the tongues has been engaged. For urging said friction-rollers toward said friction-hub for making proper'grip upon the tongue and permitting yielding of said roller, we provide springs 102. As shown, each of these springs screw-rod 106 received throu h a threaded bearing 107 in the casing, an having a nut 108 thereabout for positioning the same, this construction adjusting the tension of the springs. For adjustably limiting approach of said friction-rollers toward the frictionhub, we provide a set-screw 109 for the arm 50 of each of said swinging frames, the setscrew being threaded in a threaded bearing 110 in the casing and having a lock-nut 111 received thereover, this positioning means being provided for regulating the approach of the engaging faces on the friction-rollers toward the friction-tongues, and adjustably limiting said approach. The tongues are arranged to be received in an annular rabbet 112 of the friction-hub formed by an annular flange 113 thereabout.

It is desired that the friction-rollers 74, 75, rotate in unison with each other,-so that the engagement bet-ween either of said rollers and its mating tongue may take place at substantially the same point in the revolution of either roller, for accomplishing the movement of said sleeves in either direction. For preventing too close approach between the gears which rotate said friction-rollers we provide distancing flanges for said gears which are respectively of diameters equal to the diameters of the pitch-lines of said gears so that when the edges of adjacent spacing plates are substantially in engagement, the gears will be in their proper pitch-line relations. We provide similar plates for preventing too close approach between the fric: tion-rollers and the friction-hub. Thus 114, 115, 116, and 117 are s acing disks at one side of the gears 38, 76,77 and 82, the spacing disks preferably rota-ting with said gears, respectively as by means of pins 55, the pins 53, 54, and pins 56. 118 is a spacing disk at one side of the hub 73, secured thereto as by pins 57, and 119, 120, are spacing disks at one side of the friction-rollers 74, 75, respectively rotating therewith, as by means of the pins 53, 54, for preventing too close approach of the latter to the former, and a spacing disk 121 rotating with the gear, 82, as 'b means of pin 56, may coact with the spacing disks 118,119. We further provide means whereby, when a speedchange is taking place, the positive drive from the motor may be interrupted, the

momentum of the parts however completing' the change. Thus 127 represents the fivwheel of the engine and 128 the main drive-clutch between said fly-wheel and the drive-shaft. This clutch in usual constructions is arranged to be operated by a treadle-lever 129 pivoted on a pivot 130 to a suitable stationary part, for instance of the automobile, the treadle-lever having a fork 131 provided with a pin or pins 132 received in an annular groove 133 of the movable member 134 of the main drive-clutch. In our improved construction we provide power operating connection with said treadle-lever, shown as a rod 135 pivoted to the treadle-lever at 136 and having articulation 137 with a lever 138 shown as a bell-crank lever pivoted at 139 to a pedestal 140 in the casing, the rod 135 being articulated to one arm of said bell-crank lever.

The other arm of said lever carries a roller 141 which coacts with a scalloped face 142 on the shifting-sleeve 63, said scalloped face having raised port-ions 143 and depressions 144. When the roller 141 isin a depression the main drive-clutch will be in clutching position. When a change in speed is taking place the shifting-sleeve will shift, causing the roller to ride up one of the raised portions 143, thereby releasing the drive-clutch, which consequently releases the driving connection between the engine and the power transmitting gearing for permit, ting the gears of the power transmitting gearing to mesh each other with ease in their new relations. The construction is such further, that after the roller has passed the high point of the raised portion with which it momentarily coacts, it will aid in completing the shifting of the shiftingsleeve, this movement being further aided by the spring 145 acting on the lever 138.

For initiating movement in the power operating means for the movable member of the power transmitting gearing, we prefer to provide a shifter element 151, shown as a rocking finger on a rock shaft 152 journaled in a bearing 153 in the casing and projecting outside said casing, where an arm 154 is secured to said rock-shaft, connections 155, 156, connecting with the respective ends of said arms, preferably through the intervention of springs 157, 158. The said connections may lead to a suitable controlling mechanism, for instance such as shown, described and claimed in our copending applications Serial Nos. 630,094 and 654,610 aforesaid, the said connections corresponding for instance to the respective connections 124,425, described in said lastnamed application. The arm 154 is maintained in normal or neutral position preferably by a spring 159 acting between said arm and the casing.

The finger 151 is received in a recess 163 of the bracket 93, the bracket, in,the range of the finger, being preferably in the form of a plate 164. Said finger moves the rocker-frame 91, on which said bracket is located, by impinging against one or the other side wall of the recess 163, whereby one of the tongues 87, 88, is moved into contacting relation between one of the frictionrollers 74, 75, and the friction-hub 73, for causing a partial rotation of said hub, whereby the rack-gear 72 and the rack in mesh therewith are actuated, thereby shifting the rack-sleeve and consequently. the

gear-sleeve, for causing a speed-change in increasing or decreasing speed relation between the power transmitting members, de- 5 pendent on which of the connect-ions 155,

156, is pulled. The said rocker-frame, is.

- returned to normal position by a spring 165 acting bet-ween said rocker-frame and the casing, when the interruption in the fricq tion-rollerreaches a point opposite said tongue. In order to maintain sa1d.finger in position to reengage its recess when said swinging frame is so returned to normal position, the end of said finger maintains slipping engagement with said plate 164.-

It is desirable that engagement of the engaging faces on the friction-rollers with the tongues respectively shall be effected throughout the length of said engaging faces, so

2 that the extent of movement 0 the racksleeve may always be the same, for insuring complete shifting ,of said rack-sleeve and the ear-sleeve, when said shifting has once been initiated. In order to insure this relation we provide a lock 171 for said rocker-frame.

This lock in the present exemplification comprises a keeper 172 secured to a rock-shaft 173 journaled in a bearing 174 in the casaing and having an arm 175 thereon which carries a roller 176 received against a cam 177 on the operating shaft 36. This cam is provided with high points or releasing faces corresponding in number to theengaging faces of the'fricti'on-rollers 74, 75, and are so related thereto in position thatsaid lock v is released just prior to the time any engaging face on said friction-rollers comes opposite one of the tongues 87, 88, so as to insure that the beginning of said engaging face will contact said tongue and said tongue be moved around the axis of the frictionhub 7 3 throughout the full angular distance of travel of said engaging face. A spring 178 acts on the rock-shaft 173 for urging said keeper into locking relation. The springs 157, 158, are provided for the purpose of preventing undue strain. upon the connections 155, 156, if strain should be exerted on said connections during the time that said lock is in locking relation.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a normally rotating member and a normally inactive member, said normally rotating member having operative connection with an element of said power transmitting mechanism for rotating the same, connecting means between said 45 normally inactive member and said movmember having connection with a member able member for moving thelatt'er, and a connecting member arranged to be inserted between said normally rotating member and said normally inactive member for rendering the latter active.

2. In speed changing mechanism, the combinati' of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a normally rotating member and a normally inactive member, said normally rotating member havin operative connection with an element of said power transmitting mechanism for rotating the same, connecting means between said normally inactive member and said movable member for moving the latter, and a connecting member arranged to be inserted between said normally rotating member and said normally inactive member for rendering the latter active, and yieldable shifting -means for the latter.

3. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a normally rotating member and a normally inactive member, said normally rotating member havin operative connection with an element of said power transmitting mechanism for rotating the same, connecting means between said normally inactive member and said movable member for moving the latter, and a connecting member arranged to be inserted between said normally rotating member and said normally inactive member for rendering the latter active, a lock for said connecting member, and means for releasing said lock having operative connection with said normally rotating member for relatively timing theiroperations.

4. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable of said power transmitting mechanism for changing the speed of transmission thereof,

power operating means for said movable member embracing a normally rotating member having connection with a member of said power transmitting mechanism for driving the same, a normally stationary member having operative connection with said movable member for moving the same, and a connecting member arranged to be moved between said normally rotating memher and said normally stationary member for transmitting motion from the former to the latter, and means for initiating movement of said connecting member.

6. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a normally rotating member having connection with a member of said power transmitting mechanism for driving the same, a normally stationary member having operative connection withsaid movable member for moving the same, and-a connecting member arranged to be moved between said normally rotating member and said normally stationary. member for transmitting motion from the former to the latter, means for initiating movement of said connect-ing member, a lock for said connecting member, and releasing means for said lock.

7 In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a pair of normally rotating members rotating in opposite directions and having connection with a,-member of said power transmitting mechanism for driving the same, a normally stationary member having operative connection wit said movable member for moving the same, and a connecting member arranged to be moved between said normally rotating members and said nornfally stationary member for transmitting motion from the former to the latter, and means for initiating movement of said connecting member.

8. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operatin means for said movable member embraclng a pair of normally rotating members rotating in opposite irections and having interrupted driving faces, a normally stationary member having operative connection with said movable member for moving the same, and a connecting member arranged to be moved between said normally rotating members and said normally es- Stationary member for being squeezed by one of said driving faces and thereb transmitting movement to said normally stationary member in the direction of moveglent controlled by said last-named driving ace.

9, In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof,- power operating means. for, said movablemember embracinga pair of normally rotating members rotating in opposite directions and having interrupted driving faces, a normally stationary member having operative connection with said movable member s for moving the same, and a connecting member arranged to be moved between said normally rotating members and said normally stationary member for being squeezed by one of said driving faces and thereby transmitting movement to said normally stationary member in the direction of movement cont-rolled by said last-named driving face, a lock for said connecting member, and cam-mechanism having operative connection with said interrupted driving faces for timing the movement thereof with relation to said driving faces.

10. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member and a drive-clutch, a lever for operating said drive-clutch, a shiftable sleeve having connection with said movable member for moving the same and provided with a rack and a scalloped face, a gear rotatable in opposite directions meshing with said rack, and said lever coacting with said scalloped face for actuating said main drive-clutch.

11. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof in increasing and decreasing ratios, a main drive-clutch, a shiftable sleeve having a rack and a scalloped face thereon, the depressions of said scalloped face corresponding with engaging positions of said movable member and the elevations of said scalloped face correspondin with disengaging relations of said mova le member, a gear rotatable in opposite directions coacting with said rack for moving said shiftable sleeve endwise in oppositedirections, and connecting means between said scalloped face and 129 main drive-clutch, said connect-ing means embracing a part coacting with said scalloped face.

12. In speed changing mechanism, the combination of power transmitting mechanism embracing a longitudinally movable gear-sleeve employed in changing the speed of transmission thereof, a main drive-clutch,

a longitudinally shiftable sleeve having a toothed rack and a scalloped face thereon, a 13G lever having a contact-part thereon coacting with said scalloped face, connecting means is a reversing pinion in mesh with one of said gears, a transmitting gear in mesh with another of said gears, a gear-sleeve in line with said transmitting gear and driving and driven shafts gears'thereon shift-able with relation to other gears on said intermediate shaft, a clutch between said sleeve and transmitting gear, and means for shifting said gear-sleeve longitudinally for causing selective engagement between the clutch-faces of on said gear-sleeve and said other gears on said intermediate shaft and said reversing,

ear said -means for shiftin said earsaid last-named clutch and between the gears sleeve endwise comprising a shiftereeve,

having a rack and a scalloped face thereon, a gear coacting Withsaid rack, a lever having a contact-part thereon for said scalloped face,

said gear and contactart acting opposite to each other on sai shifter-sleeve, and 85 main drive-clutch, substantially as described.

connecting means between said lever and 14. In speed changing mechanism, the combination of power transmitting mecha- 4'0 nism embracing a movable member and means for shifting said movable member embracing a'normally stationary actuating member, normally oppositely rotating coacting parts therefor, and apair ofitongues ar- '45 between said last-named means and said actuating member for causing momentary actuation of said actuating member, said actuating member having operative connection with said movable member for moving the same.

15. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member and I55 means for shifting said movable member embracing a normally stationary actuating member, normally oppositely rotating coacting parts therefor, provided with drivin faces having interruptions, and a pair 0% ranged to be selectively operatively inserted- SD ton es arran ed to be selectively opera-' 'tiv'e y inserts between said last-named driving faces and said actuating member for causingmomentary actuation of said actuating member, and means for normally 6 withdrawing said tongues at said interrupmasses tions, said actuating member having operat-lve connection with said movable member for moving the same.

16. In speed changing mechanism, the

combination of power transmitting mecha nism embracing a movable member employed in changing the speed of transmission thereof, operating means for said movable member embracing a normally stationary memrotating the latter by the squeezing of said tongue between said members, substantially for the urpose described.

17. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for said movable member bracing a normally stationarymember having operative connection with said movable member for moving the same, and a pair of normally rotating members rotating in opposite directions and located at opposite sides of said normally stationary member and provided with driving faces having in- 'terruptions therein, a rocker-frame pivoted about the axisof rotation of said normally stationary member, oppositely extending tongues on said rocker-frame received about said normally stationary member, said tongues normally spaced from said driving faces, and means for moving said rockerframe in opposite directions for causing impact between the driving face on either of said normally rotating members, one of said tongues and said normally stationary member for transferring rotary movement to said normally stationary member through said tongue.

18. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for said movable mem-, ber embracing a normally stationary mem ber having operative connection with said movable member for moving the same, a

pair of normally rotating members rotating in opposite directions and located at opposite sides of said normally stationary member and provided with driving faces having interruptions therein, a rocker-frame pivoted about the axis of movement of said normally stationary member;i and oppositely extending tongues on sai rocker-frame received about said normally stationary member, said tongues normally spaced from said driving faces, and means for moving said rocker-frame in opposite directions for causing impact between the driving face on either of said normally rotating members, one of said tongues and said normally stationary member for transferring rotary movement to said normally stationary mem-' her through said tongue, a lock for said rocker-frame, and means for releasing said lock, said means embracinga train of driving mechanism having operative connection with said normally rotating members for timing the release of said lock with relation to said driving faces. a a

19. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof. power opera-ting means for said movable member embracing a normally rotating member provided with an interrupted driving face, a normally stationary member having operative connection with said mov able member for moving the same, a gear whose axis of rotation coincides with the axis of rotation of said normally stationary member, a gear in mesh therewith whose axis of rotation coincides with the axis of rotation of said normally, rotating member, and a distancing plate for each of said gears and having a periphery whose diameter co-' =incides substantially with the diameter of the pitch line of its gear.

20. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for saidmovable member embracing a normally stationary member having operative connection with said movable member for moving the same, a pair of normally rotating members rotating in opposite directions and having interrupted driving faces, gearing for driving the latter embracing a gear whose axis of rotation is coincident with the rotary axis of said normally stationary member and gears whose axes are respectively coincident with the axes of rotation of said normally rotating members, and an intermediate gear, a distancing plate for each of said gears whose axis of rotation is coincident with the axis of rotation of its gear and which-is of a diameter-substantially coincident with the pitch-diameter of said gear, and connectin means arranged to be received between sai driving faces and said normally stationary member for momentarily rotating the same, substantially for the purpose described.

21. In speed changing mechanism, the

thereby in line with said friction-rollers, a rocker-frame rockable about the axis of ro-' tatlon of said friction-hub, oppositely ex-' tending tongues thereon received about said friction-hub between the latter and said respective friction-rollers and normally distanced from said friction-faces on the latter,

and means for rocking said rocker frame for r inserting said respective tongues between a friction-face on said respective rollers and said intermittently rotatable hub for causing rotation of the latter, substantially as described.

22. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing a pair of normally rotating members rotating in opposite directions and provided with interrupted driving faces and an intermittently rotatable friction-hub, and a connecting member arranged to be moved between said hub and respective rollers, and means for moving said connecting member embracing a rocker-frame, a rockable finger coacting therewith, and a locating plate for said finger, said rocker frame and hub having coincident axes of rotation.

23. In speed changing mechanism, the combination ofpower transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing an intermittently rotatable friction-hub, a pair of oppositely rotating friction-rollers having interrupted driving faces thereon, a rockerframe, and oppositely extending tongues on said rocker-frame received about said hub, and means for rocking said frame for inserting either of said tongues between said hub and one of said friction-rollers, said last-named means embracing a rockable finger and a plate on said rocker-frame prorecess.

24. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for said mov 13o able member embracing an intermittently rotatable hub, oppositely rotatable frictionrollers having interrupted friction faces thereon, a tongue for each of said frictionrollers coacting with the friction face thereon arranged to be received between its friction-roller and hub and normally distanced from its coacting friction face, means for normally retracting each of said tongues and means for initiating engagement between each of said tongues and its ooacting friction face.

25. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing an intermittently rotatable friction-hub, a pair of oppositely rotating friction-rollers having interrupted driving faces thereon, a rockerframe, and oppositely extending tongues on said rocker-frame received about said hub, and means for rocking said frame for in serting either of said tongues between said hub and one of said friction-rollers, a lock for said rocker-frame, and a cam for releasing said lock having operative connection with said friction-rollers for timing the operation of said lock with relation to the driving faces on said friction-rollers.

26. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, power operating means for said movable member embracing an intermittently rotatable friction-hub, a pair of oppositely rotating friction-rollers having interruptcd driving faces thereon, a rockerfranic. and oppositely extending tongues on said rocker-frame received about said hub, and means for rocking said frame for inserting either of said tongues between said hub and one of said friction-rollers, a lock for said rocker-frame, a cani'for releasing said lock having operative connection with said friction-rollers for timing the operation of said lock with relation to the driving-faces on said friction-rollers a"nd means for normally retracting said rocker-frame.

27. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for said movable member embracing an intermittently rotatable hub, a gear whose axis of rotation is coincident therewith, an oscillating frame,

a gear cooperating with said last-named gear and a friction-roller cooperatin with said hub, said last-named gear an friction-roller having coincident axes of rotation on said oscillating frame, and a tongue arranged to be received between is coincident therewith, an oscillating frame, 7

a gear cooperating with said last named gear and a friction-roller cooperating with said hub, said last-named gear and frictionroller having coincident axes of rotation on said oscillating frame, and a ton ue arranged to be received between said rictionroller and hub and normally distanced from said friction-roller, means for inserting said tongue between the friction face on said friction-roller and said hub for momentarily transmitting rotary movement from said roller to said hub through said tongue, spring pressure means urging said oscillating frame toward said hub, and a stop for limiting said 1ast-na1ned movement.

29. In speed changing mechanism, the combination of power transmitting mech anism embracing a movable member employed in changing the speed of transmis sion thereof, and operating means for said movable member embracing an operating shaft, an intermittently rotatable hub loosely mounted thereabout, an operating gear on said shaft, a pair of driven gears rotated by the latter and a pair of friction-rollers, the gear and the friction-roller of said respective pairs having coincident axes of rotation, resilient means for urging said friction-rollers toward said hub, a rocker-frame received about said operatin shaft, and oppositely extending tongues t ereon received about said hub and normally spaced from the friction faces of said friction-rollers, and means for moving said rocker-frame in either direction for inserting said respective tongues between the respective friction faces and said hub for transmitting movement from said friction-rollers to said hub through said tongues respectively in opposite directions.

30. In speed changing mechanism, the combination of power transmittin mechanism embracin a movable mem er employed in changing the speed of transmission thereof, and operating means for said movable member embracing an 0 rating shaft, an intermittently rotatable hu loosely mounted thereabout, an operatinggear on said shaft, a pair of driven gears rotated by the latter and a. pair of friction-rollers, the gear and the friction-roller of said respect-ive pairs having coincident axes of rdtation, resilient means for urging said friction-rollers toward said hub, a rocker-frame received about said operating shaft, and oppositely extendingtongues thereon received about said hub and normally spaced from the friction .faces of said friction-rollers, means for moving said 'rocker=frame in either direction for inserting said respective tongues between the respective friction faces of said friction-rollers and said hub for transmitting movement from said frictionrollers to said hub through said tongues respectively in opposite directions, a lock for said rocker-frame, and a cam for releasing said lock having operative connection with said operating shaft for rotating the same.

31. In speed changing mechanism, the combination of power transmit-ting mechanism embracing a movable member employed in-changing the speed of transmission thereof, operating means for said mov able member embracing an operating shaft, an intermittently rotatable hub received loosely thereabout, an operating gear on said operating shaft, a pair of oscillating frames, agear and a friction-roller having coincident axes of rotation on each of said last-named frames, each of said last-named gears driven by said operating gear and said friction-rollers having interrupted friction faces thereon, a rocker-frame pivoted about said operating shaft, and o positely extending tongues on said rocker-f iame received about said. hub and normally distanced from said friction faces, and means for rocking said rocker-frame for inserting said tongues respectively between said friction faces for rotating said hub in opposite directions, and means for withdrawing said tongues.

32. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable member employed in changing the speed of transmission thereof, operating means for said'movable member embracing an operating shaft, an intermittently rotatable hub received loosely thereabout, an operating gear on said operating shaft, a pair of oscillating frames, a gear and a friction-roller having coincident axes of rotation on each of said lastnamed frames, each of said last-named gears driven by said operating gear, and said friction-roller having an interrupted friction face thereon, a rocker-frame pivoted about said operating shaft, and oppositely extending tongues on said rocker-frame received about said hub and normally distanced from said friction faces, means for rocking said rocker-frame for inserting said tongue respectively between said friction faces for transmitting the rotary movements of said friction faces to said hub through said tongues and withdrawing means for said tongues.

' 33. In speed changing mechanism, "the combination of power transmitting mechanism embracing a movable member" employed in changing the speed of transmis S1011 thereof, operating means forsaid movable member embracing a normally stationary element having operative connection with said movable member and a normally rotating element, one of said elements provided with an interrupted driving face, and a connecting member between said elements normally spaced from said driving face, resilient means for moving said connecting member into; coacting relation with said driving face, a lock 'for said connecting member, and meansffor releasing said lock having operative connection with said driving face for timing the release of said connecting member with relation to the travel of said driving face, substantially for the purpose described.

34. In speed changing mechanism, the combination of power transmitting mechanism embracing a movable 'member employed in changing the speed of transmission thereof, operating means for said movable member embracing a normally stationary element having operative connection with said movable member and a normally rotating element, one of said elements provided with an interrupted driving face, and a connecting member between said elements normallyspaced from said driving face, resilient means for moving said connecting member into coacting relation with said driving face, a lock for said connecting member, means for releasing said lock having operative connection with said driving face for timing the release ofsaid connecting member with relation to the travel of said driving face, and resilient means acting to withdraw'said connecting member upon release of said driving face therefrom, substantially for the purpose described.

35. 'In a mechanism of the character described, the combinationof a pair of groups of gears of diflerent diameters, a slidable sleeve on which one of said groups of gears is located, a slide having a part thereon connecting with said sleeve, a rack on said slide, a shaft, a gear secured thereto, an intermittently rotatable member loose about said shaft, a gear secured to thelatter in mesh with said rack, a pair of contact-parts rotatable in opposite directions at the sides of said intermittently rotatable member, gears in train with said first-named gear for rotating said contact parts, a pair of oppositely extending tongues between said intermittently rotatable member. and contactparts, a lock for the latter, and actuating 1O messes means having operative connection with names hereto in the presence of two subsaid tongues for moving the same respecscribing witnesses.

tively into engagement with said respective ARTHUR E. REUSS.

contact-parts, whereby said rack-gear is rov OSCAR SOHNITZLER. 5 tated for sliding said gear-slide, substan- Witnesses:

tially as described. EDWARDJSOUT WORTH,

In testimony Wherebf, we heve signed our THERESA SILBER. 

